Encoding:     PCM
Rate:         see below
Channels:     Mono (1)
Bit Depth:    8
Byte Signage: Signed
Endianess:    N/A
Decimal:      Integer

Some files have a header with size and frequency, but the game uses it as sample data.

Size|Period|PALfrq|Volume|Filename
----+------+------+------+--------------
    |   300| 11823|    64|LUCIFER
    |   301| 11783|    64|LASER301
  -2|   407|  8715|    64|SPLASH407
    |   301| 11783|    64|EXPLOSIONII301
    |   362|  9798|    32|PLANE